Hello all,I have a rather puzzling problem. I am running Exchange 2007 RTM with mostly Outlook 2007 clients. I need to enable a few users to send emails so that they appear to be coming from another address. For example, if the user's SMTP reply address is tom@xyz.com, I want to send the email as appearing from the user bill@abc.com. Both xyz.com and abc.com are domains that we accept emails for. The method given in the Technet article [http://technet.microsoft.com/en-us/library/aa998291.aspx] seemed to be exactly what I am looking forward for and I went ahead and implemented it.My problem is that this is working only for just one user. I gave "send as" permissions on the mailbox to three different users and only one user can successfully send emails with the from address changed. The others get the "You are not allowed to send ... " error message. I restarted the information store and tried both ways given in the article but with no success ... I would greatly appreciate any advice, suggestions regarding what could be the problem. Thanks!

Clarify: After you grant Send As permission of mailbox A to three different users, only first one of them is able to Send As for mailbox A, right? Collect info: 1. Do three users all belong to same domain? 2. Could you provide the full error info for analysis? 3. After reproduce symptom, please check clients application log for error info Troubleshooting: 1. On the EMC->recipient configuration->mailbox->right-click mailbox A->select Manage Send As Permissions->check if all three users are in there 2. On the EMS, run <Get-Adpermission id UserDisplayName | ft wrap >, check if all permitted users who has Send As permission on mailbox A, please post the output on here 3. Go to ADUC, right-click the user of mailbox A, select Properties, Security tab, check the permissions as well 4. Try to create three test users, grant test 1s Send As to test user 2 and 3 in EMC. See if you can reproduce issue

Hello,Thank you for the reply. The problem disappeared the next day. I am still very much puzzled by this ... I thought that restarting the information store was supposed to make propagating the permission changes instantaneous.

Glad your issue has been solved